I would average 1-1.5 gallons per pot spaced out into 2 feeds per day if we are talking 1 gallon rootbound pots.
Eventually, in mid flower, if your plants are taking in more water and you feel the need to do 3x feeds a day go for it.
Like critter said, coco can be waterlogged, sure. But this will happen more in a medium environment that roots havent completely taken over.
If this works I am setting up an automated watering system for the next run.